OPEC has made a planned cut in oil output effectively conditional on the contribution from non-OPEC producer Russia, delegates said on Thursday as the group gathered in Vienna for a meeting aimed at supporting battered oil prices. SEE MORE U.S. equity futures tumbled at the Asia open, sending a shock wave through stocks and setting the tone for Thursday trading. European and Asian shares slumped while Treasuries were steady and the dollar edged higher. SEE MORE Haunted by emission scandals and looming bans for diesel cars in German cities, Germany's automakers have been losing their rock-solid confidence in the future of combustion engines. But as they begin to shift toward electric cars, they are finding themselves completely reliant on Asian suppliers for lithium-ion batteries. SEE MORE China on Wednesday confirmed its intention to find solutions to its trade war with the U.S. within an agreed 90-day timetable, after President Donald Trump and other officials issued threats of consequences if Beijing failed to deliver during the period. SEE MORE OPEC and its allies are working toward a deal this week to reduce oil output by at least 1.3 million barrels per day, four sources said, adding that Russia’s resistance to a major cut was so far the main stumbling block. SEE MORE